Just a minor glitch. When Zakum hits you with his spells and shadow shifter procs the effects of the attack stays. Example1: Lightning from Zak misses you with shifter but you are still sealed. Example2: The falling totems from Zak misses you with shifter but you are still stunned. I know shadow shifter is still broken just giving more feedback on the skill that I've encountered.
Shadow shifter shouldn't be broken, so thanks for bringing this to our attention. I havent had a chance to update the master list thread yet.